Differences in Foam Densities
0.5 lb open cell spray foam insulation
The most economical option, 0.5 open cell spray foam has an R-value of 3.8 per inch. Although this is comparable in R-value to fiberglass insulation, 0.5 open cell spray foam is far superior because of it's ability to eliminate air flow. The latest research shows that over 40% of heating and/or cooling loss can be attributed to air infiltration.
2.0lb closed cell spray foam insulation
Closed cell spray foam is a patented, water blown, rigid, closed cell foam system. Because there is no chemical blowing agent, the R-value is constant, 6 per inch. It is a one step air and moisture barrier. Its primary use is in commercial applications providing a vapor barrier. It is suitable for use in areas of high humidity and vapor drive, such as crawlspaces, indoor swimming pools, and commercial freezers.
For more information on the difference between Closed Cell and Open Cell... click here
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